On the performance evaluation of hybrid decode-amplify-forward relaying protocol with adaptive M-QAM modulation over Rayleigh fading channels

2015 ◽  
Author(s):  
Amin Aref ◽  
Sonia Naderi ◽  
Omid Reza Ma'Rouzi
Keyword(s):  
Performance Evaluation ◽  
Fading Channels ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channels ◽  
Qam Modulation

scholarly journals Combined Polar Codes and 2-12 QAM over AWGN and Rayleigh Fading Channels

2021 ◽  
Author(s):  
Flávia Camila Morais Oliveira ◽  
Maria de Lourdes Melo Guedes Alcoforado ◽  
Garik Markarian ◽  
Valdemar Cardoso da Rocha Júnior
Keyword(s):  
Fading Channels ◽  
Gaussian Noise ◽  
Communication System ◽  
Rayleigh Fading ◽  
Additive White Gaussian Noise ◽  
Error Correcting Codes ◽  
Rayleigh Fading Channels ◽  
Modulation Scheme ◽  
Polar Codes ◽  
Qam Modulation

Abstract This article investigates a communication system using polar codes combined with a 2-12 QAM modulation scheme over channels disturbed by additive white Gaussian noise (AWGN) as well as over channels disturbed by Rayleigh fading in addition to AWGN. The 2-12 QAM modulation is compatible with legacy 16 QAM still widely used, and when combined with appropriate error correcting codes produces results that approach the Shannon limit.

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